Uptake flue roof for copper smelting of flash furnace

Abstract

The invention provides an uptake flue roof for copper smelting of a flash furnace. The uptake flue roof for copper smelting of the flash furnace is characterized in that a plate-type copper water jacket is arranged in an area, close to a furnace side, of a middle-portion square water jacket, a plate surface of the plate-type copper water jacket is horizontally arranged, the plate-type copper waterjacket is formed by copper water jacket units with plate edges closely arranged, cooling water paths are arranged in plate bodies of the copper water jacket units, flame-retardant layers are arrangedon lower plate surfaces of the copper water jacket units, water inlet pipes and water outlet pipes of the cooling water paths extend to upper plate surfaces of the copper water jacket units, and lifting eyes are arranged on the upper plate surfaces of the copper water jacket units. In the technical scheme, the cooling water paths are arranged in the plate bodies of the copper water jacket units with the plate bodies horizontally arranged, thus the uptake flue roof for copper smelting of the flash furnace has an excellent cooling effect, the flame-retardant layers arranged on the lower plate surfaces of the copper water jacket units in an attached mode can also be cooled effectively and evenly in time, the thermal deformation resistance capability of the uptake flue roof for copper smelting of the flash furnace is significantly enhanced, the structural strength of the flue roof of the smelting furnace is improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to the top structure of an ascending flue of a furnace body in a flash furnace copper smelting process. Background technique [0002] In the flash furnace copper smelting process, the top of the rising flue of the furnace body is the concentrated impact area of ​​high-temperature flue gas rising. Considering the continuous large heat load, the main part of the flue top is covered by hanging magnesia-chrome bricks for hanging and sealing. To reduce the heat load and slow down the excessive consumption of hanging bricks, a set of water jackets is installed every few groups of refractory bricks to absorb heat and adopt cooling methods to protect the refractory bricks. Water jackets are arranged at intervals from the flash furnace body to the boiler direction, such as figure 1 As shown, three plate-type water jacket units 1 are arranged in sequence in the same row to form a group, and 5 groups of plate-type water jacket units are arr...

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Problems solved by technology

[0003] Since the temperature of the flue gas from the top rushing can reach more than 1400 degrees, it continues to bear high heat load. Although the above-mentioned cooling water jacket structure is adopted on the top of the flue, the distance between each set of water jackets is relatively large, and the cooling strength of the hanging bricks between the water jackets is not enough.

And from the later production, it was observed that the area where the two sets of plate-shaped water jackets are located on the far right of the top of the flue (closer to the boiler side) is subjected to a greater thermal load impact. figure 1 The arrow on the right side of the center points to the flow direction of the flue gas. The loss degree of the water jacket and bricks in this area is more serious than that in other parts, indicating that the cooling method originally designed in this area is even more insufficient for this area, and bricks with different degrees of loss Inconsistencies in the expansion and extrusion force occurred, and the bricks on the flue roof also arched, which eventually led to poor overall stability of the ascending flue roof, and the hanging bricks collapsed and fell off.

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